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<html><head><title>Search for New Physics in the Exclusive Dijet plus Missing E&lt;sub&gt;T&lt;/sub&gt; Event Sample</title></head><body style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" alink="#000099" link="#000099" vlink="#990099">
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      <td align="center" bgcolor="#dddddd" valign="top"><b><big><big><font color="#cc0000">Search for New Physics in the Exclusive Dijet plus Missing E<sub>T</sub> Event 
                 Sample</font></big></big></b><br>
      </td>
    </tr>
  </tbody>
</table>
<big>
<u><b><br>
<br>
Introduction:</b></u><br>
</big><blockquote>
<big>  </big><blockquote>
<big>	Events with large missing transverse energy and one or more energetic 
        jets can be produced in many models of new physics as well
        as Standard Model (SM) production from electroweak and QCD processes.  
        The magnitude of the missing E<sub>T</sub> and the number of jets
        depends on the specific model of new physics, while the SM backgrounds 
        and instrumental effects can be studied independently. In 
        a <a href="http://www-cdf.fnal.gov/physics/exotic/r2a/20070322.monojet/public/ykk.html">
        previous analysis</a>, we studied the "monojet" configuration consisting 
        of one energetic jet balanced against large missing E<sub>T</sub>.  Here, 
        we describe studies of the exclusive dijet plus missing E<sub>T</sub> event signature.  
  </big></blockquote>
<big>  </big><blockquote>
<big>	We present the result of a generic search for new physics based on ~2.0 fb<sup>-1</sup> 
        of data collected with the missing E<sub>T</sub> trigger path (event
        Missing E<sub>T</sub> &gt; 45 GeV).  The base event sample is selected using kinematic 
	requirements of H<sub>T</sub> &gt; 125 GeV (H<sub>T</sub> is the scalar sum of
        the transverse energies of the two reconstructed jets) and event missing 
	E<sub>T</sub> &gt; 80 GeV.  
        We also perform a separate search in the high kinematic region defined by 
	H<sub>T</sub> &gt; 225 GeV and Missing E<sub>T</sub> &gt; 100 GeV.  In both 
        regions, we compare the expected SM backgrounds with observed data.  
  </big></blockquote>
<big>  </big><blockquote>
<big>        Based on the observed agreement between data and SM expectations in the 
        two kinematic regions, it is possible to place limits on a 
        wide range of models for new physics.  Here, we use a scalar leptoquark 
        model to illustrate the potential constraining power of the 
        dijet plus missing E<sub>T</sub> analysis.  The model considered is simple pair 
        production of leptoquarks with leptoquark decay via a single 
        channel (Leptoquark -&gt; jet plus neutrino).  This generic model provides 
        coverage for a range of leptoquark models, each of which is  
        characterized by a different set of quantum numbers.  The common feature 
        of these scalar models is an equivalent pair production 
        cross section that is dependent on only one parameter, the mass of the 
        leptoquark.  The limits obtained are therefore 95% C.L. lower 
        limits on the mass of the leptoquark in the context of our simple scalar 
        model.  These limits depend only slightly on leptoquark 
        generation.  The efficiency for third generation events to pass our dijet 
        plus missing E<sub>T</sub> selection criteria is smaller due to lepton
        rejection criteria, and therefore the mass limits we set for third 
        generation leptoquarks are a bit lower than those for the first and 
        second generation.       
  </big></blockquote>
<big>  </big><blockquote>
<big>        We also interpret this analysis in terms of cross-section limits on
        generic minimal supersymmetric (MSSM) models.  Four mass spectra are chosen in an
	MSSM model, with squark and gluino masses chosen which are not yet ruled out by 
	previous Tevatron searches.  Since our chosen mass spectra have gluinos which are more
	massive than squarks, minimal supergravity solutions (mSUGRA) are not allowed.
	However, we make no other assumptions on the nature of supersymmetry (SUSY) breaking.
	We set 95% C.L. cross-section upper limits on all four
	mass spectra, and compare these limits to the leading order cross sections
	calculated by Pythia.  These limits are set both for the case of pair production
	of "right-handed" squarks (the superpartners of right-handed quarks), and for inclusive
	production of squarks and gluinos (as left-handed, right-handed, or opposite-handed pairs 
	of squarks; pair production of gluinos; or production of a squark and a gluino.)  The
	mass of the four squarks in the first two generations are assumed to be degenerate,
	while the stop and sbottom are not examined.

  </big></blockquote>
</blockquote>
<big><br>
</big><div align="center">
<blockquote><big><b><small>
  <big>Kevin Burkett, Eric James</big><br>
  <big><i>Fermilab<br></i></big>
  <big>Pierre-Hugues Beauchemin</big><br>
  <big><i>University of Oxford<br></i></big>
  <big>Pier-Olivier DeVivieros, Dan MacQueen, Robert S. Orr, Pierre Savard</big><br>
  <big><i>University of Toronto<br></i></big>

</small></b><br>
</big></blockquote>
</div>
<li><big> <b> Contact people :</b> <a href="mailto:jameseb@fnal.gov,burkett@fnal.gov,savard@physics.utoronto.ca,dmacqueen@physics.utoronto.ca,h.beauchemin1@physics.ox.ac.uk">Dan, Eric, Hugo, Kevin, Pierre</a></big></li>

<big><br>
</big><hr size="2" width="100%"><big><br>

</big><li><big> <b> Low Kinematic Region:</b></big></li>
<ul>
<big>  </big><li><big> 2 Jets with E<sub>T</sub> &gt; 30 GeV </big></li>
<big>  </big><li><big> No 3rd Jet with E<sub>T</sub> &gt; 15 GeV </big></li>
<big>  </big><li><big> Scalar Jet H<sub>T</sub> &gt; 125 GeV </big></li>
<big>  </big><li><big> Event Missing E<sub>T</sub> &gt; 80 GeV </big></li>
</ul>

<li><big> <b> Results:</b></big></li>
<ul>
<big>  </big><li><big> Background Predictions:</big></li>

<big><br>
</big><table border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td align="center" valign="middle"> Background <br></td>
      <td align="center" valign="middle"> Number of Events <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Z -&gt; &#957; &#957; <br></td>
      <td align="center" valign="middle"> 888 +/- 54 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> W -&gt; &#964; &#957; <br></td>
      <td align="center" valign="middle"> 669 +/- 42 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> W -&gt; &#956; &#957; <br></td>
      <td align="center" valign="middle"> 399 +/- 25 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> W -&gt; e &#957; <br></td>
      <td align="center" valign="middle"> 256 +/- 16 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Z -&gt; l l <br></td>
      <td align="center" valign="middle"> 29 +/- 4 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Top Production <br></td>
      <td align="center" valign="middle"> 74 +/- 9 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Diboson Production <br></td>
      <td align="center" valign="middle"> 90 +/- 7 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> QCD <br></td>
      <td align="center" valign="middle"> 49 +/- 30 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Gamma plus Jet <br></td>
      <td align="center" valign="middle"> 75 +/- 11 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Non-Collision <br></td>
      <td align="center" valign="middle"> 4 +/- 4 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Total Predicted <br></td>
      <td align="center" valign="middle"> 2533 +/- 151 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Data Observed <br></td>
      <td align="center" valign="middle"> 2506 <br></td>
    </tr>
  </tbody>
</table>

<big><br>
</big></ul>
<li><big> <b> Plots:</b></big></li>

<ul>
<big>  </big><li><big> Comparison of Standard Model Background Estimate with events observed in data
       as a function of event missing E<sub>T</sub> and jet scalar H<sub>T</sub> (linear scale):</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/met_low.gif"> <img src="plots2/met_low.gif" alt="met" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/met_low.eps">eps version</a>)<br>
      </div>
      </div></td>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/ht_low.gif"> <img src="plots2/ht_low.gif" alt="met+sig" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/ht_low.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>
<big><br>

  </big><li><big> Comparison of Standard Model Background Estimate with events observed in data
       as a function of event missing E<sub>T</sub> and jet scalar H<sub>T</sub> (log scale)
       showing the stacked contributions of the various SM background processes:</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/metstack_low.gif"> <img src="plots2/metstack_low.gif" alt="met" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/metstack_low.eps">eps version</a>)<br>
      </div>
      </div></td>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/htstack_low.gif"> <img src="plots2/htstack_low.gif" alt="met+sig" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/htstack_low.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>
<big><br>

</big></ul>

<big><br>
</big><hr size="2" width="100%"><big><br>

</big><li><big> <b> High Kinematic Region:</b></big></li>
<ul>
<big>  </big><li><big> 2 Jets with E<sub>T</sub> &gt; 30 GeV </big></li>
<big>  </big><li><big> No 3rd Jet with E<sub>T</sub> &gt; 15 GeV </big></li>
<big>  </big><li><big> Scalar Jet H<sub>T</sub> &gt; 225 GeV </big></li>
<big>  </big><li><big> Event Missing E<sub>T</sub> &gt; 100 GeV </big></li>
</ul>

<li><big> <b> Results:</b></big></li>
<ul>
<big>  </big><li><big> Background Predictions:</big></li>

<big><br>
</big><table border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td align="center" valign="middle"> Background <br></td>
      <td align="center" valign="middle"> Number of Events <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Z -&gt; &#957; &#957; <br></td>
      <td align="center" valign="middle"> 86.4 +/- 12.7 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> W -&gt; &#964; &#957; <br></td>
      <td align="center" valign="middle"> 50.6 +/- 8.0 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> W -&gt; &#956; &#957; <br></td>
      <td align="center" valign="middle"> 32.9 +/- 5.2 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> W -&gt; e &#957; <br></td>
      <td align="center" valign="middle"> 14.0 +/- 2.2 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Z -&gt; l l <br></td>
      <td align="center" valign="middle"> 1.7 +/- 0.2 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Top Production <br></td>
      <td align="center" valign="middle"> 10.8 +/- 1.7 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Diboson Production <br></td>
      <td align="center" valign="middle"> 4.9 +/- 0.4 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> QCD <br></td>
      <td align="center" valign="middle"> 9.0 +/- 9.0 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Gamma plus Jet <br></td>
      <td align="center" valign="middle"> 4.8 +/- 1.1 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Non-Collision <br></td>
      <td align="center" valign="middle"> 1.0 +/- 1.0 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Total Predicted <br></td>
      <td align="center" valign="middle"> 216.1 +/- 29.8 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> Data Observed <br></td>
      <td align="center" valign="middle"> 186 <br></td>
    </tr>
  </tbody>
</table>

<big><br>
</big></ul>
<li><big> <b> Plots:</b></big></li>

<ul>
<big>  </big><li><big> Comparison of Standard Model Background Estimate with events observed in data
       as a function of event missing E<sub>T</sub> and jet scalar H<sub>T</sub> (linear scale):</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/met_high.gif"> <img src="plots2/met_high.gif" alt="met" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/met_high.eps">eps version</a>)<br>
      </div>
      </div></td>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/ht_high.gif"> <img src="plots2/ht_high.gif" alt="met+sig" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/ht_high.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>
<big><br>

</big></ul>

<big><br>
</big><hr size="2" width="100%"><big><br>

</big><li><big> <b> Limits on Scalar Leptoquark Model:</b></big></li>

<big><br>
</big><li><big> <b> Results:</b></big></li>
<ul>
<big>  </big><li><big> 95% C.L. Lower Mass Limits and Upper Cross-section Limits:</big></li>

<big><br>
</big><table border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td align="center" valign="middle"> Leptoquark Generation  <br></td>
      <td align="center" valign="middle"> Lower Mass Limit (GeV/c<sup>2</sup>) <br></td>
      <td align="center" valign="middle"> Cross-section Limit (pb) <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> 1st or 2nd <br></td>
      <td align="center" valign="middle"> 190 <br></td>
      <td align="center" valign="middle"> 0.290 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> 3rd <br></td>
      <td align="center" valign="middle"> 178 <br></td>
      <td align="center" valign="middle"> 0.442 <br></td>
    </tr>
  </tbody>
</table>
<big><br>

</big></ul>
<li><big> <b> Plots:</b></big></li>

<ul>
<li><big> Comparison of Standard Model Background Estimate with events observed in data 
     in the high kinematic region as a function of event missing E<sub>T</sub>
     and jet scalar H<sub>T</sub> (linear scale).  The additional potential signal contribution 
     from a 180 GeV/c<sup>2</sup> scalar leptoquark -- just above the limit we set -- is also shown.  
     Note that the high
     kinematic region is the more sensitive of the two for the mass region in the 
     neighborhood of our limit:</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/metLQ180_high.gif"> <img src="plots2/metLQ180_high.gif" alt="met" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/metLQ180_high.eps">eps version</a>)<br>
      </div>
      </div></td>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/htLQ180_high.gif"> <img src="plots2/htLQ180_high.gif" alt="met+sig" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/htLQ180_high.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>

<big><br>
  </big><li><big> Graphical representation of expected and observed 95% C.L. lower limits on 
       scalar leptoquark mass for first and second generations.  Note that the
       low kinematic region is a priori more sensitive for mass points of 140 GeV/c<sup>2</sup> 
       and below, while the high kinematic region is a priori more sensitive
       for mass points above 140 GeV/c<sup>2</sup>:</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/LQxsec_Limits_prelim.gif"> <img src="plots2/LQxsec_Limits_prelim.gif" alt="et1" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/LQxsec_Limits_prelim.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>
<big><br>

</big></ul>

<big><br>
</big><hr size="2" width="100%"><big><br>

</big><li><big> <b> Limits on Minimal Supersymmetric Model:</b></big></li>

<big><br>
</big><li><big> <b> Results:</b></big></li>
<ul>
<big>  </big><li><big>MSSM spectra:</big></li>

<big><br>
</big><table border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td align="center" valign="middle"> MSSM spectrum  <br></td>
      <td align="center" valign="middle"> Squark Mass (GeV/c<sup>2</sup>) <br></td>
      <td align="center" valign="middle"> Gluino Mass (GeV/c<sup>2</sup>) <br></td>
      <td align="center" valign="middle"> Lightest Neutralino Mass (GeV/c<sup>2</sup>) <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S1 <br></td>
      <td align="center" valign="middle"> 320 <br></td>
      <td align="center" valign="middle"> 390 <br></td>
      <td align="center" valign="middle"> 60 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S2 <br></td>
      <td align="center" valign="middle"> 250 <br></td>
      <td align="center" valign="middle"> 450 <br></td>
      <td align="center" valign="middle"> 72 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S3 <br></td>
      <td align="center" valign="middle"> 220 <br></td>
      <td align="center" valign="middle"> 520 <br></td>
      <td align="center" valign="middle"> 85 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S4 <br></td>
      <td align="center" valign="middle"> 120 <br></td>
      <td align="center" valign="middle"> 550 <br></td>
      <td align="center" valign="middle"> 89 <br></td>
    </tr>
  </tbody>
</table>

<big><br>
</big><li><big>95% Cross-section upper limits compared to leading order 
              calculations, right-handed squark production:</big></li>

<big><br>
</big><table border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td align="center" valign="middle"> MSSM spectrum  <br></td>
      <td align="center" valign="middle"> Observed Limit (pb) <br></td>
      <td align="center" valign="middle"> Pythia LO Calculation (pb) <br></td>
      <td align="center" valign="middle"> Ratio (Observed/Pythia) <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S1 <br></td>
      <td align="center" valign="middle"> 0.10 <br></td>
      <td align="center" valign="middle"> 0.05 <br></td>
      <td align="center" valign="middle"> 2.28 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S2 <br></td>
      <td align="center" valign="middle"> 0.18 <br></td>
      <td align="center" valign="middle"> 0.28 <br></td>
      <td align="center" valign="middle"> 0.64 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S3 <br></td>
      <td align="center" valign="middle"> 0.35 <br></td>
      <td align="center" valign="middle"> 0.61 <br></td>
      <td align="center" valign="middle"> 0.58 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S4 <br></td>
      <td align="center" valign="middle"> 81.0 <br></td>
      <td align="center" valign="middle"> 18.0 <br></td>
      <td align="center" valign="middle"> 4.49 <br></td>
    </tr>
  </tbody>
</table>

<big><br>

</big><li><big>95% Cross-section upper limits compared to leading order 
              calculations, inclusive squark+gluino production:</big></li>

<big><br>
</big><table border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td align="center" valign="middle"> MSSM spectrum  <br></td>
      <td align="center" valign="middle"> Observed Limit (pb) <br></td>
      <td align="center" valign="middle"> Pythia LO Calculation (pb) <br></td>
      <td align="center" valign="middle"> Ratio (Observed/Pythia) <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S1 <br></td>
      <td align="center" valign="middle"> 0.37 <br></td>
      <td align="center" valign="middle"> 0.36 <br></td>
      <td align="center" valign="middle"> 1.03 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S2 <br></td>
      <td align="center" valign="middle"> 0.62 <br></td>
      <td align="center" valign="middle"> 1.73 <br></td>
      <td align="center" valign="middle"> 0.36 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S3 <br></td>
      <td align="center" valign="middle"> 1.33 <br></td>
      <td align="center" valign="middle"> 3.21 <br></td>
      <td align="center" valign="middle"> 0.41 <br></td>
    </tr>
    <tr>
      <td align="center" valign="middle"> S4 <br></td>
      <td align="center" valign="middle"> 73.8 <br></td>
      <td align="center" valign="middle"> 57.4 <br></td>
      <td align="center" valign="middle"> 1.29 <br></td>
    </tr>
  </tbody>
</table>

<big><br>
</big><li><big>Since the 95% C.L. cross-section upper limits for spectra S2 and S3 are less 
     than that obtained from the Pythia LO calculation, these two spectra are ruled out at 
     leading order.  For the other two spectra, the ratio of the observed limit to the Pythia 
     cross-section is a minimal k-factor which would have to be applied to the result of the 
     LO Pythia calculation in order for these spectra to be ruled out.  Note that the high 
     kinematic region is the more sensitive region for the S1, S2, and S3 spectra, while the 
     low kinematic region is more sensitive for the S4 mass spectrum.
</big></li>

<big><br>
</big></ul>
<li><big> <b> Plots:</b></big></li>

<ul>
<li><big> Comparison of Standard Model Background Estimate with events observed in data 
     in the high kinematic region as a function of event missing E<sub>T</sub> and jet 
     scalar H<sub>T</sub> (linear scale).  The additional potential signal contribution 
     from MSSM spectrum S2 -- one of the two spectra ruled out at leading order -- is 
     also shown.  Note that the high kinematic region is the more sensitive of the two 
     for this particular mass spectrum.</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/metS2_high.gif"> <img src="plots2/metS2_high.gif" alt="met" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/metS2_high.eps">eps version</a>)<br>
      </div>
      </div></td>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/htS2_high.gif"> <img src="plots2/htS2_high.gif" alt="met+sig" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/htS2_high.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>
<big><br>

</big><li><big> Comparison of Standard Model Background Estimate with events observed in data 
     in the high kinematic region as a function of event missing E<sub>T</sub> and jet scalar 
     H<sub>T</sub> (linear scale).  The additional potential signal contributions from a 
     180 GeV/c<sup>2</sup> scalar leptoquark and MSSM spectrum S2 are both shown.</big></li>

<big><br>
</big><table style="text-align: left; width: 100%;" border="1" cellpadding="2" cellspacing="2">
  <tbody>
    <tr>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/metBoth_high.gif"> <img src="plots2/metBoth_high.gif" alt="met" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/metBoth_high.eps">eps version</a>)<br>
      </div>
      </div></td>
      <td style="vertical-align: top;">
      <div style="text-align: center;"><a href="plots2/htBoth_high.gif"> <img src="plots2/htBoth_high.gif" alt="met+sig" style="width: 398px; height: 286px;"></a><br>
      <div style="text-align: center;">(<a href="plots2/htBoth_high.eps">eps version</a>)<br>
      </div>
      </div></td>
    </tr>
  </tbody>
</table>

</big></ul>


<big><br>
</big><hr size="2" width="100%"><big><br>

</big><blockquote>
<li><big> Last updated : July 16, 2009 </big></li>
</blockquote>

<big><br>
<br>

</big></body></html>
